SB is 17/2 over 550 hands, button is 47/11 over ~50

Full Tilt No-Limit Hold'em, $0.50 BB (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

SB ($48.75)
BB ($9.80)
UTG ($40.85)
UTG+1 ($60.75)
MP1 ($29.75)
MP2 ($39.60)
Hero ($54.05)
Button ($38.80)

Preflop: Hero is CO with A, Q.
4 folds, Hero raises to $1.5, Button calls $1.50, SB calls $1.25, 1 fold.

Flop: ($5) 6, 9, 7 (3 players)
SB checks, Hero bets $3.5, Button calls $3.50, SB calls $3.50.

Turn: ($15.50) T (3 players)
SB bets $14, Hero folds, Button folds.

Final Pot: $29.50

Putting this into PokerStove gives me about 33% equity on the turn here....is that enough to justify a call here with the button still to act, or is the laydown the right move in marginal situations like this?